About the Authors

H. T. Kwan

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

David W. Chan

hysngan@hku.hk (HYSN); dwchan@hku.hk (DWC)

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Patty C. H. Cai

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Celia S. L. Mak

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Mingo M. H. Yung

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Thomas H. Y. Leung

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Oscar G. W. Wong

Affiliation Department of Pathology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Annie N. Y. Cheung

Affiliation Department of Pathology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Hextan Y. S. Ngan

hysngan@hku.hk (HYSN); dwchan@hku.hk (DWC)

Affiliation Departments of Obstetrics and Gynaecology, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HK DC HN. Performed the experiments: HK DC PC CM MY. Analyzed the data: HK DC HN. Contributed reagents/materials/analysis tools: DC TL OW AC HN. Wrote the paper: HK DC. Were involved in editing the manuscript and had final approval of the submitted and published versions: HK DC PC CM MY TL OW AC HN.